US PATENT SUBCLASS 552 / 652
.~.~.~ Carbon or halogen bonded directly at the 2-, 4- or 5-position

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


552 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, subclass 1) {11}
502  DF  .~ Cyclopentanohydrophenanthrene ring system containing {21}
650  DF  .~.~ Oxygen bonded directly at the 16- or 17-position of the cyclopentanohydrophenanthrene ring system {2}
652.~.~.~ Carbon or halogen bonded directly at the 2-, 4- or 5-position

DEFINITION

Classification: 552/652

(under subclass 650) Compounds wherein carbon or halogen is bonded directly at the 2-, 4-, or 5-position of the cyclopentanohydrophenanthrene ring system.